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Timber-Strong Design BuildSM Competition
This document, which is available at https://pswc2019.weebly.com/, describes the Student Timber-Strong Design
BuildSM Competition and states the 2019 rules for the conference. Clarifications, which include any revisions to
the rules, are published at that web site and do not appear in this document although they are formal addenda
to the rules. The web site includes the form for requesting clarifications and other information. Information at the web
site takes priority over any other source except as herein noted.
Contents
1.0 Event Description ................................................................................................................. 3
2.0 Objective ................................................................................................................................ 3
3.0 Participant Rules ................................................................................................................... 3
4.0 Safety ..................................................................................................................................... 4
5.0 Project Scope and Milestones ............................................................................................. 5
6.0 Structural Design .................................................................................................................. 6
6.1 Structural Durability‐Lateral Load: ................................................................................................................ 6
6.2 Structural Durability‐Vertical Load ................................................................................................................ 6
7.0 Report and Display Board .................................................................................................... 8
7.1 Report .............................................................................................................................................................................. 8
7.2 Display Board .............................................................................................................................................................. 9
8.0 Materials ................................................................................................................................ 9
9.0 Construction ........................................................................................................................ 10
10.0 Budget................................................................................................................................ 12
11.0 Scoring............................................................................................................................... 12
11.1 Strength and Durability Analysis in Report: 55 points ..................................................................... 12
11.2 Sustainability: 15 points ................................................................................................................................... 13
11.3 Construction: 30 points ..................................................................................................................................... 14
11.4 Presentation and Display Board: 15 points ............................................................................................ 14
11.5 Creativity/Aesthetics: 10 points.................................................................................................................... 14
11.6 Additional Possible Points Deducted and Disqualification:............................................................ 15
12.0 Additional Information ...................................................................................................... 15
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
1
WELCOME
American Wood Council, Simpson Strong-Tie, APA – The Engineered Wood Association
and the American Society of Civil Engineers support and encourage the equitable
opportunity for participation in the Student Timber-Strong Design BuildSM (TSDBSM)
Competition by all interested and eligible individuals without regard to race, ethnicity,
religion, age, gender, sexual orientation, nationality, or physical challenges. Participation
should be inclusive, open, and fair to all interested and eligible students.
Welcome!
Last Year’s Competition
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
2
Timber-Strong Design BuildSM
Competition
Pacific Southwest Conference 2019
1.0 Event Description
The American Wood Council (AWC), Simpson Strong-Tie Company Inc. (SST) and APA
– The Engineered Wood Association (APA) are interested in developing a concept for a
new subdivision of sustainable, light-framed wood student houses within the city of San
Luis Obispo, California. The city continues to witness population growth which increases
demand for housing. While other natural resources are rapidly depleting due to this
demand, wood is the only building material that grows naturally, is 100% renewable, and
outperforms other building materials in overall carbon footprint reduction. As a result,
AWC, SST and APA are seeking proposals and prototypes for a student house that is
sustainable, structurally durable, and efficient.
2.0 Objective
The 2019 Timber-Strong Design BuildSM (TSDBSM) Competition enables students to gain
experience in performing crucial aspects of common civil engineering design and
practice. Participating students will learn about the processes involved in professionally
designing and proposing a project bid, which must be unique and not a replication of a
previous year’s design. Students will also gain exposure to the management and building
practices used in construction environments. Through preparation of a project bid, the
performance of analysis, and management of the construction process, each team is
expected to act as a design construction firm while competing in a friendly environment.
It is the goal of this competition to provide unique insight and hands-on experience for the
next generation of structural engineers involved in sustainable design and construction.
3.0 Participant Rules
● Maximum of 20 teams may participate.
● Each University may enter only one team per department (max. two teams per
University)
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
3
○ In the interest of collaboration, universities with American Society of Civil
Engineers (ASCE) Student Chapters are encouraged to combine into one
team
○ ASCE Architectural Engineering Institute (ASCE/AEI) Student Chapters are
encouraged to participate.
● All team members must be a registered participant of PSWC 2019
● Teams shall consist of a minimum of 4 engineering students.
● 4-6 members shall be designated as “builders”.
● The members designated as “builders” may not change once the team is on the
jobsite.
● One builder of the team must be identified as the Team Captain.
● The team must have at least one underclassman.
● The team must have at least one male and one female.
● The team members shall not vary throughout the competition. In other words, the
team members that start the competition will be the same team members that
complete all portions of the competition.
● The team must have a least one faculty advisor.
4.0 Safety
Safety is the highest priority; activities that risk personal injury will not be tolerated. PSWC
Safety Officials may use their own discretion on determining a hazardous condition and
provide suggestions for correcting the issue. If a team member cannot compete safely,
they will be disqualified. The remaining team members may continue with the competition
if the number of team members does not drop below 4 builders. PSWC Safety Officials
may take action which results in withdrawal of a building from competition for safety
violations if they are not corrected once brought to the attention of the team. Judges are
empowered to halt and prohibit any activity that PSWC Safety Officials deem hazardous.
If the structure being built is deemed by PSWC Safety Officials to be unsafe to
participants, judges or spectators, it must be withdrawn from competition.
Students shall practice safe fabrication procedures and seek appropriate instruction and
supervision (see Section 9.0). General construction safety standards for activities during
this competition shall follow the standards set forth in OSHA Regulation Standards
Number 1926. The following are the URL addresses to the OSHA Standards 1926:
https://www.osha.gov/laws-regs/regulations/standardnumber/1926
and CAL/OSHA Title 8 of the California Code of Regulations (T8 CCR)
https://www.dir.ca.gov/samples/search/query.htm
related to construction industry (Pocket Guide For the Construction Industry may be found
at https://www.dir.ca.gov/dosh/dosh_publications/constguideonline.pdf).
Student teams are solely responsible to follow the safety standards.
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
45.0 Project Scope and Milestones
Scope:
Each of the Universities within the Pacific Southwest Region are invited to structurally
design and construct a light-framed wood structure. Throughout the design process,
teams are required to create a preliminary design and a final bid report.
Each team is required to construct the wood structure which was designed in the team
report at the “construction site”. Each team will conclude with a display board presentation
(see Section 8.0).
The PSWC 2019 hosts will provide each team captain with a link to a Google Drive Folder
where the report, pictures and videos of the team’s design and building process, and the
team presentation must be uploaded. To gain access to this folder, each team Captain
must send an email to pswc2019@gmail.com with [Timber-Strong Design BuildSM Folder
request] in the email title. The folder may include practices, meetings, etc. as well as
photos and/or videos of the competition itself. All teams must have photos and/or videos
in the folder before 4:30 pm pacific time on April 6, 2019 (the day of the Timber-Strong
Design BuildSM competition) or the team will be disqualified.
Milestones:
● March 15, 2019 - Report
● March 15, 2019 - Requests for SST connectors and fasteners
● March 15, 2019 - Requests for stipends
● April 5, 2019, 7:00pm pacific time - Captain’s meeting:
● April 6, 2019 - Display Board & Presentation after each build session
● April 6, 2019 - Construction of Structure:
● April 6, 2019, 4:30 pm pacific time - Google Folder with at least 1 photo and video
of presentation:
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
56.0 Structural Design
Each team will design the structure for both lateral and vertical loads as follows.
6.1 Structural Durability-Lateral Load:
a. The structure shall be designed and analyzed to resist an applied
lateral seismic load of W = 350 pounds per linear foot (plf) at the roof
in both directions (not simultaneously).
b. Using the wind Allowable Stress Design (ASD) capacities, the
diaphragm and shear walls shall be based on the 2015 Special
Design Provisions for Wind and Seismic standard. Link:
http://awc.org/codes-standards/publications/sdpws-2015
c. Assume that the structure will be connected to a foundation with
typical anchor bolts and SST hold-downs.
6.2 Structural Durability-Vertical Load
d. A vertical point load of 135 pounds will be applied at the end of the
cantilever roof beam after the construction phase via steel chain and
iron weights to perform the beam deflection test. Deflection will be
measured at the loading point.
e. In the design report, teams shall calculate the predicted deflection
assuming all applicable adjustment factors are equal to 1.0. This
predicted deflection from the report will be compared to the actual
deflection measured at the competition.
f. Beam deflection, once loaded, must at least .5” and not great than
1”.
The demand (load) on the structural shall not exceed the capacity (resistance) of the
structure.
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
6Figure 1.
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
77.0 Report and Display Board
7.1 Report
Each team’s report must include:
1. Table of Contents
2. All team member names and email address. Additionally, identify the 4-6
members who are designated at the “builders”.
3. Carbon Footprint calculations
a. Analyze the carbon footprint for 10x the building’s structural framing
volume to simulate an actual full-size building. Determine the
amount of carbon stored in the single-story structure using the
WoodWorks Carbon Calculator tool found at
http://www.woodworks.org/carbon-calculator-download-form/
b. All input and output shall be provided.
4. Itemized list of materials including costs and scanned receipts
5. Calculations of the entire weight of the structure
6. Legible structural HAND calculations (non-computer analyzed). Must
include the following:
a. Lateral Design
i. Roof diaphragm design (in-plane shear only)
ii. Shear wall design (in-plane shear only)
iii. Anchorage to the foundation that includes anchor bolt and
SST hold-downs to resist in-plane shear and overturning.
NOTE: structures are not allowed to be anchored to the job
site area and it is the team’s responsibility to provide adequate
measures to resist overturning loads as a result of, the applied
cantilever loading.
iv. Factor of safety for the diaphragm and shear walls (rations of
allowable/actual)
b. Vertical Design
i. Design of ridge beam
ii. Deflection of cantilever
iii. Max load the roof should be able to hold/support within the
0.50 inch deflection constraint
7. A statement that all team members have read and understand the rules
including section 4.0 Safety in addition to the referenced OSHA and
CAL/OSHA documents.
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
88. Statement of how the team will remove the structure from the site and 2-3
methods of recycling or donating the structure after the competition (see
Section 9.0 Construction).
7.2 Display Board
Each team’s display board must be 30” tall x 40” wide with a foam-core base.
On the board:
1. Drawings, graphics, text, photos, etc. that summarize and illustrate the
significant aspects of the project. Minimally, the board must contain:
a. University and team member names.
b. Graphics and/or photos of the structure
c. Ratio of the Factor of Safety for the diaphragm and the shear walls
to the calculated weight of the entire structure.
d. Design features
e. Total material cost of the structure
f. Total calculated weight of the structure
2. The board shall be displayed on an easel near the completed structure at
the building construction site or designated area.
3. Each team will give a display board presentation (10 minutes max.) about
their project upon completion of the construction of their structure. A video
recording of the presentation shall be uploaded into the team folder.
8.0 Materials
All framing shall be of sawn lumber or engineered wood products. Wood structural panels
are permitted to be used for the diaphragm and shear walls (structural insulated panels
(SIPS) are not permitted). Connections shall be made with nails, screws, and steel
connectors.
Each team is responsible for bringing their own tools and safety gear (minimum
requirements include construction hard hat, safety glasses, gloves, closed toed shoes)
for use at the construction site. NOTE: Nail guns and power saws are not permitted to be
used at the competition.
All supplies (materials, connectors, tools, etc.) to construct the structure shall be provided
by each team. NOTE: Simpson Strong-Tie will donate connectors and fasteners (see
section 10.0 Budget).
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
99.0 Construction
Each team will construct their proposed single-family house per the design shown in their
submitted report and display board. A hard copy of the report and 24” x 36” structural
drawings must be on the job site. Teams that do not construct the structures to the
specifications outlined within the report and display board will be subject to a scoring
penalization (see section 11.0 Scoring). All individual structural framing members are
allowed to be pre-cut prior to the competition date. The wall framing assemblies
(excluding wall wood structural panel) is the only structural component of the building that
may be pre-fabricated prior to the competition date. No prefabrication may be done at the
building site prior to the start of the competition. The remainder of the structure, including
the roof and all roof and wall sheathing, must be installed at the construction site during
the competition (see section 8.0 Materials). Construction on-site during the competition
will be judged based on the time of construction, materials cost and accuracy of
construction according to the team report. Material costs will be graded with respect to
the provided receipts (see section 10.0 Budget). Without proof of receipts the calculated
cost will not be accepted. Please refer to section 11.0 Scoring for any other scoring
concerns.
Each team is responsible for removal of all material used for the project after the
competition. Each team will coordinate with the PSWC organizers prior to the competition
and define in writing their plans for removal of all material. Potential reuse or recycling of
the project materials should be determined prior to the competition and included on the
display board. Possible solutions include donating salvageable materials to Habitat for
Humanity or other charitable organizations or researching other options at:
http://reusewood.org/.
9.1 Site Constraints
All teams will be provided with a 15’ x 15’ area known as the “construction site” as
defined by clearly marked lines on the floor (or ground) to construct their structure.
The construction site limits will be measured from the inside of the boundary
marker. All construction materials (including framing members, fasteners,
connectors, tools, etc.) must remain in the construction site during the entire
construction process. Point reductions shall apply for violations. (see section 11.0
Scoring). All sites will be located on level surfaces.
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
109.2 Time Constraints
The construction process will be timed for each team. A maximum of 1.5 hours
will be allotted for each team’s construction period.
1. All teams shall have their materials set up within the construction site prior
to the start time.
2. No construction shall start within the construction site prior to the start time.
3. No additional materials may be added to the construction site after the start
time.
4. Upon completion of the assembly of a team’s structure, all team builders
must exit the construction site before the timer is officially stopped.
5. Team builders will receive a penalty for exiting the construction site prior to
completion of the structure (see section 11.0 Scoring).
9.3 Design Constraints
All proposed and constructed structures shall have a footprint dimension of 4’x6’,
which is measured to the outside face of wood stud wall. Wall sheathing, roof
sheathing, roof eaves, and the cantilever ridge beam may extend outside the
footprint dimension. The structure shall comply with the following rules:
1. Design and build a structurally efficient building system of wood light-framed
construction.
2. The single-story structure shall include all the elements that are included in
the team’s structural design, including but not limited to:
a. Roof system: A ridge board/beam that cantilevers 4’ outside of the
footprint to support the applied point load. The slope of the roof shall
be determined by the team. The overall height of the structure shall
not exceed 8 feet, measured from the highest point of the roof (ex.
ridge beam) to the bottom of the structure (see figure 1).
b. Framed openings: three 12” x 12” windows and one 24” (width) x
48” (height) door. The windows may be located anywhere, but the
door must be on one of the longitudinal elevations. (See diagram).
c. Shear walls and diaphragms specified in the structural calculations
and drawings.
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
1110.0 Budget
Each team will provide a budget based on the receipts for the materials used to design
their structure. This should be an itemized list of the cost of materials. If materials were
donated, obtain an estimated cost from the donor. Each participating university has the
option to use an allotment of Simpson Strong-Tie products (total maximum retail value of
$300.00).
Additionally, to encourage participation, AWC and APA is offering a stipend to qualifying
teams of $300.00 max. per team, to offset the materials and t-shirts for the first 20 teams
to request the stipend.
Teams will need to request the stipend and/or the SST connectors/fasteners by
completing and submitting the request forms which will be posted on the PSWC 2019
website.
11.0 Scoring
Scoring will be based on the team’s report and construction of their building. There is a
total of 125 points possible. In the instance of a tie, the teams involved will receive the
same place and score. For example, if two teams tie for second place in build time, both
will receive 20 points.
11.1 Strength and Durability Analysis in Report: 55 points
Points will be awarded for the most durable structure based on the performance to
withstand the wind lateral and vertical loads, as well as the structural efficiency of
the overall structure.
Factor of Safety 15 points
Points will be rewarded based on the ratio of the factor of safety of the lateral
design in the report over the calculated weight of entire structure.
Diaphragm
● 7.5 points for the lowest ratio of factor of safety to entire weight of structure
● 5 points for the second lowest ratio of factor of safety to entire weight of
structure
● 2.5 points for the third lowest ratio of factor of safety to entire weight of
structure
Shear Walls
● 7.5 points for the lowest ratio of factor of safety to entire weight of structure
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
12● 5 points for the second lowest ratio of factor of safety to entire weight of
structure
● 2.5 points for the third lowest ratio of factor of safety to entire weight of
structure
● 5 points will be deducted for incorrect analysis
Completeness and Accuracy of the structural calculations 15 points
Points will be awarded based on the structural analysis completeness and
correctness.
● 15 points for most complete and correct report
● 10 points for the second most complete and correct report
● 5 points for the third most complete and correct report
Structural Drawings: 10 points
Points will be awarded based on the accuracy of the drawings
● 10 points for most complete and correct report
● 6 points for the second most complete and correct report
● 3 points for the third most complete and correct report
Deflection 15 points
Points will be awarded based on ratio of predicted deflection from the report to
actual deflection measured in competition.
● 15 points for the ratio of the predicted deflection to actual deflection closest
to 1.0
● 10 points for the ratio of the predicted deflection to actual deflection second
closest to 1.0
● 5 points for the ratio of the predicted deflection to actual deflection third
closest to 1.0
11.2 Sustainability: 15 points
Points will be awarded for the most sustainable structure based on the submitted
Life Cycle Assessment (LCA) and carbon sequestration reports.
● 15 points for the lowest carbon footprint as determined by the WoodWorks
Carbon Calculator tool.
● 10 points for the second lowest carbon footprint as determined by the
WoodWorks Carbon Calculator tool.
● 5 points for the third lowest carbon footprint as determined by the
WoodWorks Carbon Calculator tool.
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
1311.3 Construction: 30 points
Points will be awarded based on the time of the construction build and materials
cost.
Time: 15 points
Time will begin being recorded after the builders have laid out their materials, hold
their hands above their heads and the captain states that they are ready to begin.
NOTE: The team is not allowed to start constructing their project on the
construction site until the time starts recording.
● 15 points for the fastest recorded build time
● 10 points for the second fastest recorded build time
● 5 points for the third fastest recorded build time
Materials Cost: 15 points
Material costs will be graded with respect to the provided receipts as discussed
within the Budgets Section. Without proof of receipts the cost calculated will not be
accepted.
● 15 points for the lowest cost of materials
● 10 points for the second lowest cost of materials
● 5 points for the third lowest cost of materials
11.4 Presentation and Display Board: 15 points
Points will be awarded for the content and presentation of the display board.
● 5 points for all required elements present on the display board and meeting
the size criteria
● 5 points for a board that is well-organized and clearly communicates the
design and sustainability considerations
● 5 points for a presentation that is complete and thorough
○ 2 points will be deducted for exceeding the 10-minute presentation
time limit
11.5 Creativity/Aesthetics: 10 points
Points will be awarded by the judges for the most creative and aesthetically
pleasing structure.
● 10 points for first place
● 6 points for second place
● 3 points for third place
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
1411.6 Additional Possible Points Deducted and
Disqualification:
● Up to 10 points will be deducted if the structure is not constructed to the
specifications and drawings in the report. Each team must have a hard
copy of the report and 24” x 36” structural drawings must be on the job site.
● 5 points will be deducted for each instance that materials, tools or builders
are out of bounds
● 5 points will be deducted for structures, excluding the cantilever, that are
larger than 4’ w x 6’ w x 8’ h dimensions.
● 5 points will be deducted if the measured beam deflection is less than 0.5
inches or greater than 1.0 inch.
● Teams will be disqualified from the competition if the folder does not contain
the report and pictures/videos (see section 5.0)
● Structure failure results in a disqualification.
● If there are any safety violations as identified by PSWC Safety Officials, the
team must correct the issue(s) or they will be disqualified.
12.0 Additional Information
● Teams may submit questions as explained through the “FAQ” page of the
www.pswc2019.com website.
● There will be a team captain’s meeting the evening before the competition where
they can also ask questions. All judges should be present at this meeting.
● Each team is responsible for video recording their presentation and taking pictures
of the completed structure which shall be uploaded into the team’s Google drive
folder immediately after the TSDBSM Competition.
● All electronic entries/pictures and videos entries shall become the sole property of
the sponsors: American Wood Council, Simpson Strong-Tie and APA-The
Engineered Wood Association. Sponsors reserve the right to use or publish all
entry material in publications, social media, etc. By entering, the Entrants grant a
royalty-free license to American Wood Council, Simpson Strong-Tie, and APA-The
Engineered Wood Association to use any material submitted. Such right includes
publication of photographs and names of award recipients without compensation
to Entrants.
● Final judging shall be completed on the day of the competition.
PSWC 2019 Official Event Rules ● www.pswc2019.weebly.com
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